"I can't find one person who has been using the Nexus 7 for an extended period of time, and hasn't seen a massive downgrade in performance. Just what kind of downgrade are we talking here? I cannot pick up my Nexus 7 without experiencing problems like a lag of ten seconds, or more, just to rotate the display; touches refusing to acknowledged; stuttering notification panel actions; and unresponsive apps." Fully and utterly agreed. My Nexus 7 was blazing-fast and awesome for a few months, and at some point, it just started sucking. Just like that. I've tried loads of ROMs, and nothing helps.

Can't believe no one's suggested the most obvious reason for these slow downs. Forget plausible possibilities like filesystem clogs, and Trim implementations..

It's obviously after around this length of time, depending of course upon how quickly you've racked up a suitable keyword quotient, that the NSA monitoring machine will have picked you up, logged you as monitor worthy - and will presently be 'logging on' to your device and installing keyloggers, decryptosomes and all sorts..! Which necessarily slow things down 25-75%